loadimage.inc

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/image_util/loadimage.inc

//
// Copyright 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

#include "common/mathutil.h"

#include <string.h>

namespace angle
{

namespace priv
{

template <typename T>
inline T *OffsetDataPointer(uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
{
    return reinterpret_cast<T*>(data + (y * rowPitch) + (z * depthPitch));
}

template <typename T>
inline const T *OffsetDataPointer(const uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
{
    return reinterpret_cast<const T*>(data + (y * rowPitch) + (z * depthPitch));
}

}  // namespace priv

template <typename type, size_t componentCount>
inline void LoadToNative(size_t width, size_t height, size_t depth,
                         const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
                         uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
    const size_t rowSize = width * sizeof(type) * componentCount;
    const size_t layerSize = rowSize * height;
    const size_t imageSize = layerSize * depth;

    if (layerSize == inputDepthPitch && layerSize == outputDepthPitch)
    {
        ASSERT(rowSize == inputRowPitch && rowSize == outputRowPitch);
        memcpy(output, input, imageSize);
    }
    else if (rowSize == inputRowPitch && rowSize == outputRowPitch)
    {
        for (size_t z = 0; z < depth; z++)
        {
            const type *source = priv::OffsetDataPointer<type>(input, 0, z, inputRowPitch, inputDepthPitch);
            type *dest = priv::OffsetDataPointer<type>(output, 0, z, outputRowPitch, outputDepthPitch);

            memcpy(dest, source, layerSize);
        }
    }
    else
    {
        for (size_t z = 0; z < depth; z++)
        {
            for (size_t y = 0; y < height; y++)
            {
                const type *source = priv::OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
                type *dest = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
                memcpy(dest, source, width * sizeof(type) * componentCount);
            }
        }
    }
}

template <typename type, uint32_t fourthComponentBits>
inline void LoadToNative3To4(size_t width, size_t height, size_t depth,
                             const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
                             uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
    const type fourthValue = gl::bitCast<type>(fourthComponentBits);

    for (size_t z = 0; z < depth; z++)
    {
        for (size_t y = 0; y < height; y++)
        {
            const type *source = priv::OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
            type *dest = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
            for (size_t x = 0; x < width; x++)
            {
                dest[x * 4 + 0] = source[x * 3 + 0];
                dest[x * 4 + 1] = source[x * 3 + 1];
                dest[x * 4 + 2] = source[x * 3 + 2];
                dest[x * 4 + 3] = fourthValue;
            }
        }
    }
}

template <size_t componentCount>
inline void Load32FTo16F(size_t width, size_t height, size_t depth,
                         const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
                         uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
    const size_t elementWidth = componentCount * width;

    for (size_t z = 0; z < depth; z++)
    {
        for (size_t y = 0; y < height; y++)
        {
            const float *source = priv::OffsetDataPointer<float>(input, y, z, inputRowPitch, inputDepthPitch);
            uint16_t *dest = priv::OffsetDataPointer<uint16_t>(output, y, z, outputRowPitch, outputDepthPitch);

            for (size_t x = 0; x < elementWidth; x++)
            {
                dest[x] = gl::float32ToFloat16(source[x]);
            }
        }
    }
}

template <size_t blockWidth, size_t blockHeight, size_t blockDepth, size_t blockSize>
inline void LoadCompressedToNative(size_t width, size_t height, size_t depth,
                                   const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
                                   uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
    const size_t columns = (width + (blockWidth - 1)) / blockWidth;
    const size_t rows = (height + (blockHeight - 1)) / blockHeight;
    const size_t layers = (depth + (blockDepth - 1)) / blockDepth;

    for (size_t z = 0; z < layers; ++z)
    {
        for (size_t y = 0; y < rows; ++y)
        {
            const uint8_t *source = priv::OffsetDataPointer<uint8_t>(input, y, z, inputRowPitch, inputDepthPitch);
            uint8_t *dest = priv::OffsetDataPointer<uint8_t>(output, y, z, outputRowPitch, outputDepthPitch);
            memcpy(dest, source, columns * blockSize);
        }
    }
}

template <typename type, uint32_t firstBits, uint32_t secondBits, uint32_t thirdBits, uint32_t fourthBits>
inline void Initialize4ComponentData(size_t width, size_t height, size_t depth,
                                     uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
    type writeValues[4] =
    {
        gl::bitCast<type>(firstBits),
        gl::bitCast<type>(secondBits),
        gl::bitCast<type>(thirdBits),
        gl::bitCast<type>(fourthBits),
    };

    for (size_t z = 0; z < depth; z++)
    {
        for (size_t y = 0; y < height; y++)
        {
            type *destRow = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
            for (size_t x = 0; x < width; x++)
            {
                type* destPixel = destRow + x * 4;

                // This could potentially be optimized by generating an entire row of initialization
                // data and copying row by row instead of pixel by pixel.
                memcpy(destPixel, writeValues, sizeof(type) * 4);
            }
        }
    }
}

} // namespace angle

kc3-lang/angle/src/image_util/loadimage.inc

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kc3-lang/angle /src/image_util/loadimage.inc